*{
    margin:0;
    padding: 0;
    list-style: none;
    
}
html,body{
	height: 100%;
}


.background{
    
    height: 100%;
    background: url("http://cdn.duitang.com/uploads/item/201507/15/20150715190033_sKMc4.jpeg") no-repeat;
    background-size:contain;
    
}

.div1{

    float: left;
    margin-top: 100px;
    margin-left: 500px;
   
    width: 400px;
    height: 450px;
    border: green 1px solid;
    border-radius: 4px;
}

.div1 input{
   
    border: green 1px solid;
    border-radius: 4px;
    width: 260px;
    height: 40px;
    margin-left: 139px;
    border-right: none;
    
}

.div1 .inner-div1{
    background:url(sportcar.png) no-repeat;
    background-size: contain;
    position: relative;
    margin-bottom: 10px;
}

.div1 .inner-div2{
    background: url(squirrel.png) no-repeat;
    background-size: contain;
    position: relative;
    margin-bottom: 20px;
}


.div1 .inner-div1 .inner2-div1,.inner2-div2{
    width: 30px;
    height: 30px;
    background-color: blue;
    
}

.div1 .inner-div1 .inner2-div1{
    position: absolute;
    left: 75px;
    top: 5px;
    background:url("11.png") no-repeat;
    background-size: contain;
}

.div1 .inner-div2 .inner2-div2{
    position: absolute;
    left: 75px;
    top: 5px;
    background: url("2.png") no-repeat;
    background-size: contain;
    
}

.div1 ul li button{
    width: 135px;
    height: 135px;
    
    border-radius: 50%;
    
}
.div1 ul li{
    width: 135px;
    height: 135px;
    float: left;
    border-radius: 50%;
    
}
.div1 ul li1{
background: url("乘.png") no-repeat;
background-size: contain;
}
.div1 ul li2{
background: url("除.png") no-repeat;
background-size: contain;
}
.div1 ul li3{
background: url("加.png") no-repeat;
background-size: contain;
}
.div1 ul li4{
background: url("减.png") no-repeat;
background-size: contain;
}
